2089610 jmdict A [id=2167130]

けり
[1][aux-v][arch]
  indicates recollection or realization (i.e. of hearsay or the past); can form a poetic past tense
[2][aux-v][arch]
  indicates continuation from the past to the present
[3][n]
  [note="from the use of the aux. at the end of waka, also written with the ateji 鳧"]
  end; conclusion
  [see=2025190・けりが付く[1]]
  [see=2025200・けりを付ける[1]]